Chemistry is traditionally divided into organic and inorganic chemistry. HPLC of Formula: C17H14O, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 538-58-9
PYRANDERIVATE DURCH <4+2>-CYCLOADDITION ZWISCHEN alpha,beta-UNGESAETTIGTEN CARBONYLVERBINDUNGEN UND PHOSPHACUMULENYLIDEN
alpha,beta-Unsaturated carbonyl compounds 1 and phosphacumulene ylides 2 undergo a <4+2>-cycloaddition with formation of pyran-substituted phosphoranes 3.Benzoic acid catalyzed Hofmann degradation of 3 yields the deeply coloured pyran derivatives 5.
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Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate